A loop array antenna with expandable reading and writing area

Abstract

The invention discloses a ring array antenna with an extensible read-write area. The ring array antenna with the extensible read-write area comprises a dielectric slab, a ring antenna array, metal ground, a power distributor, a matching circuit and a feed port. The ring antenna array, the power distributor, the matching circuit and the feed port are installed on the front face of the dielectric slab, and the power distributor is connected with the ring antenna array and the matching circuit, and the feed port is connected with the matching circuit. The metal ground is installed on the back face of the dielectric slab, and the matching circuit is connected with the metal ground. The ring antenna array is formed by multiple ring antenna units. Extension of the read-write area of the ring array antenna is realized through adjusting a number and an array forming mode of the ring antenna units. The ring array antenna can be used for extending the read-write area, and improving accuracy of read-write.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a loop array antenna with an expandable reading and writing area. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact two-way data communication through radio frequency. RFID technology has the following advantages: automatically identify the target object, no visible light source is required; the radio frequency signal penetrates the external material for direct reading, protects the outer packaging, and saves unpacking time; can work in harsh environments; the reading distance is long; supports writing data; multiple tags can be processed simultaneously. RFID technology is considered to be one of the most promising technologies in the 21st century. In the upcoming world of the Internet of Things, the application of RFID technology will rise to a new height. [0003] Radio frequency identification RFID systems generally consist of readers and ...

AI Technical Summary

Problems solved by technology

However, when the perimeter of the loop antenna increases, the center of the loop is too far away from the perimeter of the loop, resulting in a weak magnetic field at the center of the loop, making the loop array antenna a read-write hole in the center of the loop, which makes it impossible to achieve 100% reading of the radio frequency tag. Write

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